Nine new species of Horismenus Walker (Hymenoptera: Eulophidae) in Brazil, with an emphasis on the fauna of one of the largest tropical forests on the planet, the Atlantic Forest.

Horismenus Walker (Hymenoptera: Eulophidae) is one of the largest genera in Eulophidae, and additional collecting in tropical America will undoubtedly add numerous new species. Here we describe nine new species of Horismenus from material collected in Brazil, mainly in Atlantic Forest remnants: H. amplicavus sp.

Horismenus saturnus n. sp. (Hymenoptera, Eulophidae) a New Parasitoid Wasp from Eggs of Saturniidae (Lepidoptera) from the Atlantic Forest, Minas Gerais, Brazil.

A new species of Horismenus Walker, H. saturnus Schoeninger & Hansson (Hymenoptera: Eulophidae), is described from material reared from eggs of an unidentified species of Saturniidae (Lepidoptera). The new species is compared to H.

First Record of Telenomus dilophonotae (Hymenoptera, Scelionidae), Parasitizing Eggs of Erinnyis ello (Lepidoptera, Sphingidae) in Western Paraná, Brazil, with Molecular Characterization and Records of Occurrences.

There are few records for Telenomus dilophonotae Cameron, 1913 (Hymenoptera, Scelionidae) from South America. In Brazil, the first occurrence was reported in Bahia in rubber crops, Hevea brasiliensis (Willd. ex Adr.

A Synopsis of Knowledge of the Rhopalosomatidae (Hymenoptera) in Brazil: an Annotated Checklist of the Family in the Country, with a Revised Key to the Brazilian Genera.

This study is focused on the cricket leeches, Rhopalosomatidae, a family that is only poorly represented in entomological collections in Brazil. We provided a revised and updated key to the genera occurring in Brazil with the major traits of genera illustrated through high-resolution photomicrography. Also, we provided a synopsis of genera, a list of the species currently recorded from Brazil, the first country records for Rhopalosoma minus Townes, 1977 and Rhopalosoma breelandi Townes, 1977, which increases the diversity of these wasps in the country.

Description of the immature stages of the Neotropical whirligig beetle Gyrinus (Neogyrinus) rozei Ochs, 1953 (Coleoptera: Gyrinidae) and first report of the parasitoid wasp Melanosmicra sp. (Hymenoptera: Chalcididae) on a Gyrinus species.

In most species of Gyrinidae, the immature stages are unknown, especially due to the difficulty in collecting the juveniles and assigning them to a particular species. Molecular association is a feasible technique that may solve this problem. Recent studies have used DNA sequence data, specifically the gene cytochrome oxidase subunit I (COI), to associate immature and adult stages, thus enabling the description of the former.